void hsv_to_rgb(t_env *e, double p, double q, double t)
{
double hh;
double ff;
int i;
hh = e->h / 60;
i = floor(hh);
ff = hh - i;
p = e->v * (1.0 - e->s);
q = e->v * (1.0 - (e->s * ff));
t = e->v * (e->s * (1.0 - ff));
p *= 250;
q *= 250;
t *= 250;
(i == 0) ? hsv0(e, p, t) : 1;
(i == 1) ? hsv1(e, p, q) : 1;
(i == 2) ? hsv2(e, p, t) : 1;
(i == 3) ? hsv3(e, p, q) : 1;
(i == 4) ? hsv4(e, p, t) : 1;
if (i == 5)
{
e->r = e->v;
e->g = p;
e->b = q;
}
}
// ---------- begin of function ColorTable::color_dist_hsv --------//
int ColorTable::color_dist_hsv(RGBColor c1, RGBColor c2)
{
// calculate a distance for the colour
// h betweeh 0 and 6
// s between 0 and 1
// v between 0 and 1
HSVColor hsv1(rgb2hsv(c1));
HSVColor hsv2(rgb2hsv(c2));;
double dx = hsv2.saturation * cos(hsv2.hue * M_PI / 3.0) - hsv1.saturation * cos(hsv1.hue * M_PI / 3.0);
double dy = hsv2.saturation * sin(hsv2.hue * M_PI / 3.0) - hsv1.saturation * sin(hsv1.hue * M_PI / 3.0);
double dv = hsv2.brightness - hsv1.brightness;
return int(10000 * ( dx*dx + dy*dy + dv*dv*BRIGHTNESS_WEIGHTING ));
}
